1225643154 has 8 divisors (see below), whose sum is σ = 2451286320. Its totient is φ = 408547716.

The previous prime is 1225643123. The next prime is 1225643191. The reversal of 1225643154 is 4513465221.

It is a sphenic number, since it is the product of 3 distinct primes.

1225643154 is an admirable number.

It is a super-2 number, since 2×1225643154² = 3004402281894135432, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102136924 + ... + 102136935.

It is an arithmetic number, because the mean of its divisors is an integer number (306410790).

Almost surely, 2^1225643154 is an apocalyptic number.

1225643154 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225643154 is a wasteful number, since it uses less digits than its factorization.

1225643154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204273864.

The product of its digits is 28800, while the sum is 33.

The square root of 1225643154 is about 35009.1867086341. The cubic root of 1225643154 is about 1070.1747040559.

The spelling of 1225643154 in words is "one billion, two hundred twenty-five million, six hundred forty-three thousand, one hundred fifty-four".